FR2517158B1 - Transducteur a electret comportant une plaque arriere metallisee selectivement - Google Patents

Transducteur a electret comportant une plaque arriere metallisee selectivement

Info

Publication number
FR2517158B1
FR2517158B1 FR8219312A FR8219312A FR2517158B1 FR 2517158 B1 FR2517158 B1 FR 2517158B1 FR 8219312 A FR8219312 A FR 8219312A FR 8219312 A FR8219312 A FR 8219312A FR 2517158 B1 FR2517158 B1 FR 2517158B1
Authority
FR
France
Prior art keywords
rear plate
electret transducer
selectively metallized
metallized rear
selectively
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR8219312A
Other languages
English (en)
French (fr)
Other versions
FR2517158A1 (fr
Inventor
David Arthur Berkley
Ilene Joy Busch-Vishniac
Robert Lee Wallace Jr
James Edward West
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of FR2517158A1 publication Critical patent/FR2517158A1/fr
Application granted granted Critical
Publication of FR2517158B1 publication Critical patent/FR2517158B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/326—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49226—Electret making

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR8219312A 1981-11-20 1982-11-18 Transducteur a electret comportant une plaque arriere metallisee selectivement Expired FR2517158B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/323,667 US4429189A (en) 1981-11-20 1981-11-20 Electret transducer with a selectively metalized backplate

Publications (2)

Publication Number Publication Date
FR2517158A1 FR2517158A1 (fr) 1983-05-27
FR2517158B1 true FR2517158B1 (fr) 1986-11-14

Family

ID=23260204

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8219312A Expired FR2517158B1 (fr) 1981-11-20 1982-11-18 Transducteur a electret comportant une plaque arriere metallisee selectivement

Country Status (7)

Country Link
US (1) US4429189A (enExample)
JP (1) JPH0646838B2 (enExample)
CA (1) CA1186044A (enExample)
DE (1) DE3242556A1 (enExample)
FR (1) FR2517158B1 (enExample)
NL (1) NL8204510A (enExample)
SE (1) SE454123B (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495385A (en) * 1982-12-02 1985-01-22 Honeywell Inc. Acoustic microphone
US5388163A (en) * 1991-12-23 1995-02-07 At&T Corp. Electret transducer array and fabrication technique
CA2256389C (en) * 1996-05-24 2004-11-30 Armand P. Neukermans Improved microphones for an implantable hearing aid
JP7410935B2 (ja) 2018-05-24 2024-01-10 ザ リサーチ ファウンデーション フォー ザ ステイト ユニバーシティー オブ ニューヨーク 容量性センサ

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR874440A (fr) * 1940-02-12 1942-08-06 Atlas Werke Ag Appareil pour émissions ou réceptions dirigées d'énergie ondulatoire
GB893444A (en) * 1959-10-15 1962-04-11 Joseph Guy Enock Improvements in or relating to loudspeakers
US3372245A (en) * 1963-01-25 1968-03-05 Matsushita Electric Industrial Co Ltd Electrostatic electro-acoustic transducer
US3588382A (en) 1967-10-11 1971-06-28 Northern Electric Co Directional electret transducer
GB1239658A (enExample) 1969-04-17 1971-07-21
JPS5121791B2 (enExample) 1972-08-04 1976-07-05
US3895194A (en) 1973-05-29 1975-07-15 Thermo Electron Corp Directional condenser electret microphone
SE7411457L (enExample) * 1973-09-15 1975-03-17 Bowers And Wilkins Electronics
AT351783B (de) 1976-12-20 1979-08-10 Akg Akustische Kino Geraete Ultraschallwandler
US4188513A (en) 1978-11-03 1980-02-12 Northern Telecom Limited Electret microphone with simplified electrical connections by printed circuit board mounting
JPS5593180U (enExample) * 1978-12-19 1980-06-27
US4311874A (en) * 1979-12-17 1982-01-19 Bell Telephone Laboratories, Incorporated Teleconference microphone arrays

Also Published As

Publication number Publication date
FR2517158A1 (fr) 1983-05-27
US4429189A (en) 1984-01-31
CA1186044A (en) 1985-04-23
NL8204510A (nl) 1983-06-16
JPH0646838B2 (ja) 1994-06-15
DE3242556C2 (enExample) 1993-08-26
DE3242556A1 (de) 1983-05-26
SE8206381D0 (sv) 1982-11-10
JPS5895499A (ja) 1983-06-07
SE8206381L (sv) 1983-05-21
SE454123B (sv) 1988-03-28

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